A method for safe and high-quality production of leafy rapeseed in lightly polluted vegetable fields in cadmium
A technology for rape and vegetable fields, applied in the field of safe and high-quality production of leaf rape, can solve the problems of reducing absorption, reducing crop Cd bioavailability, reducing crop Cd content, etc. Affordable and low-cost effects
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Embodiment 1
[0034] Pot experiment of spraying compound foliar conditioner to regulate safe and high-quality production of rapeseed
[0035] The potted experiment site is located in the glass greenhouse of the Environmental Protection Institute of the Ministry of Agriculture, and there are no pollution sources around the site. The soil for the test was collected from the sewage irrigation vegetable field in Dongli District, Tianjin. The soil type is fluvo-aquic soil. The basic physical and chemical properties are: pH 7.88, cation exchange capacity CEC 15.4cmol / kg, organic matter content 2.95%, and total Cd content 2.33mg / kg , is a moderately Cd-polluted soil with a total Mn content of 545mg / kg. Rapeseed cultivar for leaves tested was Zaohuaguan with low cadmium accumulation.
[0036] The compound foliage conditioner used in this test is prepared by the following steps:
[0037] (1) Weigh 15.4, 30.7, 61.5g MnSO respectively 4 ·H 2 O was dissolved in 750ml of water, and then 21.4, 42.8, ...
Embodiment 2
[0048] Field experiment of spraying compound foliar conditioner to control the safe and high-quality production of rapeseed I-Cadmium moderately polluted vegetable field
[0049] The test site is located in the sewage-irrigated vegetable field of Dabizhuang Village, Dongli District, Tianjin. The vegetable field is located in the Beipaihe sewage-irrigated area of Tianjin. Since the 1970s, urban domestic sewage and industrial sewage have been used for irrigation for a long time. The soil and production Vegetables are polluted by heavy metals. The basic physical and chemical properties of the demonstration site soil are as follows: pH value 7.95, CEC 17.3cmol / kg, organic matter content 3.43%, Cd content 2.89mg / kg, Mn content 478mg / kg. According to the national soil environmental quality standard, the vegetable field soil is moderately polluted by cadmium. Rapeseed rape tested included: common variety Hanlu, low cadmium accumulation varieties Zaohuaguan and Kawada Keiko.
[0050...
Embodiment 3
[0069] Field experiment of spraying compound foliar conditioner to control the safe and high-quality production of rapeseed II-Slightly polluted vegetable field with cadmium
[0070] The test site is located in the sewage-irrigated vegetable field of Nanhezhuang Village, Dongli District, Tianjin. The vegetable field is located in the sewage-irrigated area of Beipai River in Tianjin. Since the 1980s, urban domestic sewage and industrial sewage have been used for irrigation for a long time. The soil and production Vegetables are polluted by heavy metals. The basic physical and chemical properties of the demonstration site soil are as follows: pH value 8.38, CEC 18.3cmol / kg, organic matter content 3.21%, Cd content 1.63mg / kg, Mn content 546mg / kg. According to the national soil environmental quality standard, the soil of the vegetable field is mildly polluted by cadmium.
[0071] The tested rape varieties, spraying treatments and methods, rape cultivation management, Cd and Mn ...
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